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Determining When a Preference Node Is Added or Removed

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This section illustrates you to determine when a Preference Node is added or removed.

Determining When a Preference Node Is Added or Removed

     

This section illustrates you to determine when a Preference Node is added or removed. You can see in the given example that we have add a new node by using the method userRoot().node("/Hello World"). The method exportSubtree(System.out) will show you the added node in the Preference tree. In order to remove the added node, we have used the method removeNode() which removes this preference node and display the message on the console.

Here is the code of AddedOrRemoved.java

 

 

 

 

 

import java.util.prefs.*;

public class AddedOrRemoved{
public static void main(String []args) throws Exception{
Preferences child = Preferences.userRoot().node("/Hello World");
  System.out.println("A new node is added");
  child.exportSubtree(System.out);
  try {
  child.removeNode();
 System.out.println("A new node is removed");
 catch (Exception e) {}
}
}

Output will be displayed as:

Download Source Code:

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Comments:1
Peggy
November 1, 2011
ttxnfhJWAkABw

Could you write about Physics so I can pass Sceicne class?